Tpetra: Reduce device-to-host memcpy calls in non-uvm builds #11120

seanofthemillers · 2022-10-06T15:50:38Z

@trilinos/tpetra

Motivation

This results in a decent (up to 3x) performance improvement on non-UVM builds for CUDA/ROCm for problems with large matrices (e.g. >1 GB). Changes include:

WrappedDualView initialization from device view no longer initializes host dataspace using the device data.
CrsGraph/CrsMatrix have duplicate calls to copy the same row ptrs view from device to host 5-6 times in a row. This is now reduced to 1 time for trivial constructions (i.e. packed == unpacked).

Stakeholder Feedback

Testing

seanofthemillers · 2022-10-06T15:51:47Z

This will need to wait until #11087. Tests pass up through MueLu, but I haven't tested against Panzer.

cgcgcg · 2022-10-06T15:56:41Z

@trilinos/tpetra

trilinos-autotester · 2022-10-06T20:27:34Z

Status Flag 'Pre-Test Inspection' - - This Pull Request Requires Inspection... The code must be inspected by a member of the Team before Testing/Merging
NO INSPECTION HAS BEEN PERFORMED ON THIS PULL REQUEST! - This PR must be inspected by setting label 'AT: PRE-TEST INSPECTED'.

jhux2 · 2022-10-06T21:20:52Z

Let's see what the AT thinks.

trilinos-autotester · 2022-10-06T21:27:21Z

Status Flag 'Pre-Test Inspection' - SUCCESS: The last commit to this Pull Request has been INSPECTED by label AT: PRE-TEST INSPECTED! Autotester is Removing Label; This inspection will remain valid until a new commit to source branch is performed.

trilinos-autotester · 2022-10-06T21:29:27Z

Status Flag 'Pull Request AutoTester' - Testing Jenkins Projects:

Pull Request Auto Testing STARTING (click to expand)

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Build Num: 1211
Status: STARTED

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Using Repos:

Repo: TRILINOS (seanofthemillers/Trilinos)

Pull Request Author: seanofthemillers

trilinos-autotester · 2022-10-07T02:02:04Z

Status Flag 'Pull Request AutoTester' - Jenkins Testing: all Jobs PASSED

Pull Request Auto Testing has PASSED (click to expand)

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Build Num: 1211
Status: PASSED

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CDash Test Results for PR# 11120.

trilinos-autotester · 2022-10-07T02:02:23Z

Status Flag 'Pre-Merge Inspection' - - This Pull Request Requires Inspection... The code must be inspected by a member of the Team before Testing/Merging
WARNING: NO REVIEWERS HAVE BEEN REQUESTED FOR THIS PULL REQUEST!

trilinos-autotester · 2022-10-07T02:02:29Z

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trilinos-autotester · 2022-10-08T02:02:30Z

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trilinos-autotester · 2022-10-09T02:02:37Z

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csiefer2

Changes to WrappedDualView are good ones!

They remove a host copy and mark the device view as modified, so if you don't need the host part for a while, you don't have to do the copy. Efficient!

trilinos-autotester · 2022-11-02T04:20:05Z

Status Flag 'Pre-Merge Inspection' - - This Pull Request Requires Inspection... The code must be inspected by a member of the Team before Testing/Merging
THE LAST COMMIT TO THIS PULL REQUEST HAS BEEN REVIEWED, BUT NOT ACCEPTED OR REQUIRES CHANGES

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All Jobs Finished; status = PASSED, However PR is now STALE, and must be retested. Set the AT: RETEST Label to force retest....

trilinos-autotester · 2022-11-03T04:33:52Z

All Jobs Finished; status = PASSED, However PR is now STALE, and must be retested. Set the AT: RETEST Label to force retest....

csiefer2

Empire tests passed, so let's merge this

seanofthemillers · 2022-11-03T21:36:14Z

Thanks @csiefer2!

trilinos-autotester · 2022-11-08T05:48:43Z

Status Flag 'Pull Request AutoTester' - User Requested Retest - Label AT: RETEST will be reset after testing.

trilinos-autotester · 2022-11-08T05:50:37Z

Status Flag 'Pull Request AutoTester' - Testing Jenkins Projects:

Pull Request Auto Testing STARTING (click to expand)

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Build Num: 1385
Status: STARTED

Jenkins Parameters

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Using Repos:

Repo: TRILINOS (seanofthemillers/Trilinos)

Pull Request Author: seanofthemillers

trilinos-autotester · 2022-11-08T10:22:24Z

Status Flag 'Pull Request AutoTester' - Jenkins Testing: all Jobs PASSED

Pull Request Auto Testing has PASSED (click to expand)

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Build Num: 1385
Status: PASSED

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CDash Test Results for PR# 11120.

trilinos-autotester · 2022-11-08T10:22:42Z

Status Flag 'Pre-Merge Inspection' - SUCCESS: The last commit to this Pull Request has been INSPECTED AND APPROVED by [ csiefer2 ]!

trilinos-autotester · 2022-11-08T10:22:49Z

Status Flag 'Pull Request AutoTester' - AutoMerge IS ENABLED, but the Label AT: AUTOMERGE is not set. Either set Label AT: AUTOMERGE or manually merge the PR...

trilinos-autotester · 2022-11-09T10:48:14Z

Status Flag 'Pull Request AutoTester' - AutoMerge IS ENABLED, but the Label AT: AUTOMERGE is not set. Either set Label AT: AUTOMERGE or manually merge the PR...

trilinos-autotester · 2022-11-10T23:34:52Z

Status Flag 'Pull Request AutoTester' - AutoMerge IS ENABLED, but the Label AT: AUTOMERGE is not set. Either set Label AT: AUTOMERGE or manually merge the PR...

Tpetra: Changes to Dual View initialization to help with performance

b9bf282

cgcgcg added the pkg: Tpetra label Oct 6, 2022

jhux2 added the type: enhancement Issue is an enhancement, not a bug label Oct 6, 2022

jhux2 added the AT: PRE-TEST INSPECTED Required to test outside contributions. This label alone will not allow a PR to merge. label Oct 6, 2022

trilinos-autotester removed the AT: PRE-TEST INSPECTED Required to test outside contributions. This label alone will not allow a PR to merge. label Oct 6, 2022

trilinos-autotester added the AT: STALE Added by the PR autotester if too much time has elapsed since the last successful PR test iteration label Oct 13, 2022

csiefer2 reviewed Nov 2, 2022

View reviewed changes

csiefer2 approved these changes Nov 3, 2022

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csiefer2 added AT: RETEST Causes the PR autotester to run a new round of PR tests on the next iteration and removed AT: STALE Added by the PR autotester if too much time has elapsed since the last successful PR test iteration labels Nov 3, 2022

trilinos-autotester added the AT: STALE Added by the PR autotester if too much time has elapsed since the last successful PR test iteration label Nov 8, 2022

trilinos-autotester removed the AT: STALE Added by the PR autotester if too much time has elapsed since the last successful PR test iteration label Nov 8, 2022

trilinos-autotester removed the AT: RETEST Causes the PR autotester to run a new round of PR tests on the next iteration label Nov 8, 2022

csiefer2 merged commit 4dea6cc into trilinos:develop Nov 10, 2022

Tpetra: Reduce device-to-host memcpy calls in non-uvm builds #11120

Tpetra: Reduce device-to-host memcpy calls in non-uvm builds #11120

Conversation

seanofthemillers commented Oct 6, 2022

Motivation

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Testing

seanofthemillers commented Oct 6, 2022

cgcgcg commented Oct 6, 2022

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jhux2 commented Oct 6, 2022

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trilinos-autotester commented Oct 6, 2022

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_gcc-7.2.0-serial

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_gcc-7.2.0-debug

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_intel-17.0.1

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_clang-10.0.0

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_cuda-10.1.243

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_python3

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_cuda-11.4.2-uvm-off

Jenkins Parameters

Using Repos:

trilinos-autotester commented Oct 7, 2022

Build Information

Test Name: Trilinos_PR_gcc-8.3.0

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_gcc-7.2.0-serial

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_gcc-7.2.0-debug

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_intel-17.0.1

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_clang-10.0.0

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_cuda-10.1.243

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_python3

Jenkins Parameters

Build Information

Test Name: Trilinos_PR_cuda-11.4.2-uvm-off

Jenkins Parameters

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csiefer2 left a comment •

edited

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